Improvement in adjustable treadles for sewing-machines



Sewing-Machines, &c.

Patented August 12, I873.

Jig. Z.

EFIIESSSS! UNITED STATES PATENT DFFIGE.

JOSEPH MGEVOY, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN ADJUSTABLE TREADLES FOR SEWING-MACHINES, &c.

Specification forming part of Letters Patent No. 141,722, dated August12, 1873; application filed March 15, 1873.

To all whom it may concern:

Be it known that I, JOSEPH MOEVOY, of Brooklyn, in the county of Kingsand State of New York, have invented a new and Improved AdjustableTreadle for Sewing-Machines, Lathes, &c., of which the following is aspecification:

My invention consists of an arrangement of the treadle pivot-rod, incurved slots in the end frames or other supports, for adjusting thetreadle toward or from the front of the machine to suit the operator.The slots are curved to the axis of the crank-shaft, so that thedistance between the rod and the center remains the same. My inventionalso consists in having the treadle pivot-rod cranked at the ends andprovided with binding-nuts, or other equivalent devices, so that byturning the rod on its axis the treadle can also be adjusted to vary theheight.

Figure 1 is a front elevation of a sewingmachine frame with my improvedtreadle attachment, the cross-bars being sectioned to show the manner ofsecuring the cranked pivot-rod to hold the treadle high or low. Fig. 2is a transverse sectional elevation of Fig. 1 taken on the line or w.Fig. 3 is also a transverse sectional elevation, showing the slottedbearings for the pivot-rods formed in detachable bars, which Ipropose touse in some cases to facilitate the attachment of my adjustable treadleto machines already in use. Fig. 4 is a section on the line 3 y of Fig.3, the parts being considerably enlarged to show them more clearly. Fig.5 is a side elevation of an adjustable rest for holding the crankedtreadle-rod.

A represents the table of a sewing-machine, lathe, or any other machineto be worked by foot-power. B represents the standards, at the ends, forsupporting it and the treadle pivot-rod O. In these frames, or theircorresponding parts in any other machine, I make curved slots D on aline struck from the axis of the crank-shaft E, and lit the pivot-rodGin it at the ends, as shown clearly in the drawing, and providebinding-nuts G for screwing them fast, for adjusting the treadle Jforward and back relatively to the front of the machine, as may berequired, to suit different operators.

I may have the slots straight, but I prefer to have them curved,asshown; for, if straight, the connecting-rod would have to beadjustable as to length, and I propose to crank the pivot-rod, as shownat H, so that I can swing the treadle up or down to vary the height ofit, as I wish.

In applying this improved adjustable treadle to new machines, I willform the slots D in the end frames, as above described 5 but forconstructing the attachment so that it can be readily applied tomachines already made, I will provide curved slotted bars H for holdingthe rod, and bolt them on the frame, and inthis case I will have heads Ion the rod, at the ends, and arrange the binding-nuts inside of thebars, so that they will not interfere with the end frames as they wouldon the side, and they will not be affected by the frames. The bars willhave-recesses on the side next to the frames along the slot to provideroom for the heads. with notches for holding the rod 0 at differentheights, will be used in combination with the curved rod, in the mannershown in Fig. 1, to prevent the pressure of the foot from turning thecranked rod down.

This improved treadle can be adjusted in a moment for a tall or shortperson; it has no complications, and is easily understood; it will notget out of order by any conditions to which it will ordinarily besubject; it requires no adjustment of the pitman as to length, as someothers do, and only requires the unscrewing and screwing up of the nutsby a wrench, and the shifting of the rod and its rest to make the adjustment; it can be 'regu lated quickly to any shoe, with or withoutheels; it is conducive to health, because by having it adjusted exactlyto the requirements of the operator it is much less fatiguing to workthe machine than when not rightly adjusted. It can be so adjusted thatthe strain can, at will, be sustained by the ankle, knee, or hip. I

A notched rest, M, v

Having thus described my invention, I claim with binding-nuts forelampin g it to the frame,

as new and desire to secure by Letters Patent 1. The treadle-pivot O,mounted in the slots D, curved upon the are of a circle, described fromthe axis of the crank-shaft, as zhplwn and described, for the purposespeci- 2. The treadle pivot-rod, cranked so as to adjust the treadle asto height, and provided substantially as specified.

3. The combination of a notched rest, M, with the cranked treadlepivot-rod 0, sub stantially as specified.

JOSEPH MOEVOY.

Witnesses T. B. MOSHER, ALEX. F. Ronnn'rs;

